Windows 10 Serial Number Info

http://winaero.com/blog/how-to-view-your-product-key-in-windows-10-windows-8-and-windows-7/

Open Notepad.

Copy and paste the following text into the Notepad window

Option Explicit   
Dim objshell,path,DigitalID, Result  
Set objshell = CreateObject("WScript.Shell") 
'Set registry key path 
Path = "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\" 
'Registry key value 
DigitalID = objshell.RegRead(Path & "DigitalProductId") 
Dim ProductName,ProductID,ProductKey,ProductData 
'Get ProductName, ProductID, ProductKey 
ProductName = "Product Name: " & objshell.RegRead(Path & "ProductName") 
ProductID = "Product ID: " & objshell.RegRead(Path & "ProductID") 
ProductKey = "Installed Key: " & ConvertToKey(DigitalID)  
ProductData = ProductName  & vbNewLine & ProductID  & vbNewLine & ProductKey 
'Show messbox if save to a file  
If vbYes = MsgBox(ProductData  & vblf & vblf & "Save to a file?", vbYesNo + vbQuestion, "BackUp Windows Key Information") then 
  Save ProductData  
End If 
'Convert binary to chars 
Function ConvertToKey(Key) 
   Const KeyOffset = 52 
   Dim isWin8, Maps, i, j, Current, KeyOutput, Last, keypart1, insert 
   'Check if OS is Windows 8 
   isWin8 = (Key(66) \ 6) And 1 
   Key(66) = (Key(66) And &HF7) Or ((isWin8 And 2) * 4) 
   i = 24 
   Maps = "BCDFGHJKMPQRTVWXY2346789" 
   Do 
          Current= 0 
       j = 14 
       Do 
          Current = Current* 256 
          Current = Key(j + KeyOffset) + Current 
          Key(j + KeyOffset) = (Current \ 24) 
          Current=Current Mod 24 
           j = j -1 
       Loop While j >= 0 
       i = i -1 
       KeyOutput = Mid(Maps,Current+ 1, 1) & KeyOutput 
       Last = Current 
   Loop While i >= 0  
   If (isWin8 = 1) Then 
       keypart1 = Mid(KeyOutput, 2, Last) 
       insert = "N" 
       KeyOutput = Replace(KeyOutput, keypart1, keypart1 & insert, 2, 1, 0) 
       If Last = 0 Then KeyOutput = insert & KeyOutput 
   End If     
   ConvertToKey = Mid(KeyOutput, 1, 5) & "-" & Mid(KeyOutput, 6, 5) & "-" & Mid(KeyOutput, 11, 5) & "-" & Mid(KeyOutput, 16, 5) & "-" & Mid(KeyOutput, 21, 5) 
End Function 
'Save data to a file 
Function Save(Data) 
   Dim fso, fName, txt,objshell,UserName 
   Set objshell = CreateObject("wscript.shell") 
   'Get current user name  
   UserName = objshell.ExpandEnvironmentStrings("%UserName%")  
   'Create a text file on desktop  
   fName = "C:\Users\" & UserName & "\Desktop\WindowsKeyInfo.txt" 
   Set fso = CreateObject("Scripting.FileSystemObject") 
   Set txt = fso.CreateTextFile(fName) 
   txt.Writeline Data 
   txt.Close 
End Function 

Save the text above to a file with the ".vbs" extension on the Desktop.

Bonus tip: To make sure that you saving the file correctly with the ".vbs" extension, you can type its name enclosed in double quotes, for example, "BackupWindowsKey.vbs".Now open your BackupWindowsKey.vbs file you product key is displayed on the screen!